16 CYPRINIDa. 



Catostomus nigricans, Storer, Report Ichth. Massach. p. 86 .(not 



Lesueur). 

 florealis, Baird. 



D. 14(-15). A. 8-9. L. lat. 59-70. L. transv. |?^'. 



^ ■^ 13-14 



Vert. 29/18. 



The height of the body is equal to, or somewhat more than, the 

 length of the head, which is two-ninths or nearly one-fourth of the 

 total (without caudal). Lips very thick, papillose, the lower deeply 

 bilobate. Eye small, behind the middle of the length of the head 

 (more so in old than in young examples) ; suborbital of moderate 

 width, but narrower than the fleshy part of the cheek below it. 

 There are eight or nine longitudinal series of scales between the 

 lateral line and the root of the ventral. Scales on the fore part of 

 trunk conspicuously smaller than those on the tail, frequently with 

 the free margin more or less distinctly lobate. 



Northern parts of America. 



a-h. Young : skins. Ohio. From Dr. Parnell's Colleetion. 



c. Adult. New York. Purchased of Mr. Brandt. 



d. Fine specimen. Massaehusets. Presented by Th.M core, Esq. 



e. Adult. Boston. Presented by B. Winstone, Esq. 



f-g. Adult. Memniack River, Massaehusets. Purchased of Mr. 

 Wright.— L. lat. 65. 



h. Adult. Lake Bangely. Purchased of Mr. Wright. 



i-m. Large specimens. Montreal. Purchased of Mr. Wright. — 

 L. lat. 60. 



n. Young. Montreal. Purchased of Mr. Wright. — L. lat. 65. 



0. Skin, 23 inches long. Lake Huron. Presented by Sir J. Rich- 

 ardson. — L. lat. 69. — Type of C. reticulatus. 



p-r. Adult : skins. Albany River. Presented by Sir J. Richardson 

 as O. hudsonius. 



8-u. Adult : stuffed. Arctic regions. Presented by J. Rae, Esq.' 



V. Adult : stuffed. Lake Madawaska, Lower Canada. — L. lat. 60. 



w. Adult : stuffed.— L. lat. 64. 



X. Skeleton of adult female. Montreal. Purchased of Mr. Wright. 



This appears to be the species described in Agassiz's ' Lake Supe- 

 rior,' p. 358, as C.forsterianus '; the author of that description enters 

 into details of characters common to aU species of Catostomus, but 

 does not even mention the number of either scales or fin -rays. 



Catostomus lahiatus, Ayres, in Proc. Calif. Acad. Nat. Sc. i. 1855, 

 p. 32 ; Girard, in U. S. Pac. R. R. Exped. Fish. p. 224, from Cali- 

 fornia, is, according to the description, most closely allied to C. teres, 



7. Catostomus aureolus. 



Catostomus aureolus, Lesueur, I. c. p. 95 ; Cuv, Sf Val. xvii. p. 439 ; 



Agass. Lake Super, p. 357. 

 Ptychostomus aureolus, Agassiz, Amer. Journ. Sc.SfArts, xix.1855, p.89. 



D. 14. A. 8-9. L. lat. 63. 



Form of the body similar to that of C. teres. Lower lip bilobed. 



